Before Friday's game, Dodgers manager Dave Roberts was asked to preview the weekend series with the St. Louis Cardinals. He accommodated the questioner, saying he expected "good, clean baseball."Boy, was he wrong.Not that Roberts should mind. The Dodgers and Cardinals have combined for eight errors (including six by their two rookie shortstops, Corey Seager and Aledmys Diaz) in the first two games of the series.